Nozzle tester



A. J. COLE NOZZLE TESTER Aug. 8, 1950 4 Sheets-Sheet 1 Filed July 25, 1945 Aug. 8, 1950 Filed July 25, 1945 A. J. COLE NOZZLE TESTER 4 Sheets-Sheet 2 [liken-n12 us A. J. COLE Aug. 8, 1950 NOZZLE TESTER 4 Sheets-Sheet 3 Ill. 3

MT fi u J,im,i W1 Ti; 5;: s: 2% 5 m g 4 A w\\ I l atenteci Aug. 8, 1950 UNITED STATES PATENT OFFICE NOZZLE TESTER Abel J. Cole, Chicago, 111., assignor to TheBuda Companyfliiarvey, 111., a corporation of Illinois Application July 25, 1945, .Serial No.606 983 10 Claims.

.a new and improved nozzle tester which enables an operator to test with facility a wider variety of characteristics than the apparatus heretofore in use.

Another object of my invention is to provide a new and improved nozzle tester which will .readily test injection pressure, valve operation,

spray pattern, and tightness of joints between various sections of thenozzle itself.

Another object of my invention is to provide a new and improved :nozzle tester which can be readily adjusted to meet any or all of the foregoing tests.

Another object of my invention is to provide a .new and improved nozzle tester which may be readily adjusted to operate with all of the various conventional types of nozzles commonly in use.

Other objects and advantages will become apparent as the description proceeds.

In the drawings:

Fig. 1 is-a perspective view ofa particular arrangement of nozzle testing apparatus embodying my invention;

Fig. 2 is a, side elevation of a nozzle testing cradle with a nozzle mounted therein and the various parts constructed and arranged to test the nozzle for leakage between various sections of the nozzle itself;

Fig. 3 is a view similar to Fig. 2 but Showing the apparatus set up to test the spray pattern type of'nozzle block fixture and showing the manher in which this fixture is applied to a nozzle in- (heated in phantom;

Fig. 6 is a side elevation of the apparatus shown in Fig. 5;

Fig. '7 is a transverse section taken on the line 1- 1 PI Fig. 6;

Fig. 8 is a plan view of a portable mounting base;

Fig. 9 is a sectional view taken on the line 9--9 of Fig, 8;

Fig. 10 is a side elevation looking in the directionof the arrows lfll1l in Fig. 8;

*Fig. 11 is an irregular section through the nozzle block and supporting structure of Fig. Zand is taken on the line I l-H of that figure.

In Fig. 1,I have illustrated a conventional arrangement of nozzle testing apparatus comprising a portable mounting base A, a nozzle supporting cradle B, a combined fuel oil reservoir and high pressure pumping unit C and aspray pan D. The unit 0 has a filling opening 20 through which the reservoir 22 is filled with fuel oil and a high pressure pump 24 operated by a handle 26 which delivers 'fuel oil under pressure to a fitting 28 located on the top of the reservoir 22. The fitting 28 is provided with a nipple 30 to which a flexible pipe 32 may be attached. A high pressure gauge 34 is mounted on the upper end of the fitting 28 and communication between the fitting and gauge is controlled by a valve which is moved to open or closed position by a handle 36.

Fuel discharged by the pump 'Mfiows through flexible pipe 32 to a low pressure gauge 38 and a rigid pipe .40 threaded into an appropriate opening inthe nozzle 42 Whichis mounted in the cradle B for test purposes. The spray pan D is adapted to catch the fuel discharged from the nozzle 42 and to retain this fuelthroughout the test and until the pan is emptied by the operator. In this way fuel oil sprayed from the nozzle is confined instead of being permitted to accumulate on the bench or other support on which the test is performed. The spraypan D is adjustably and removably supported on an upright pin 44 attached to the portable base A.

Referring particularly to Figs. 8, 9, and 10, it will be seen that this portable base A comprises a sheet metal platform 45 having supporting legs 48 drilled as indicated at 5!] to receive screws, bolts, or any other suitable means for attaching the mounting base A to a bench or support as desired. It is not esesential that this base be so attached to the bench or other article on which the test is conducted as operation of the high pressure pump 24. and other parts of the testing apparatus do not require that the base A be firmly attached toa bench or other support.

On the upper surface of the platform 45 there is welded, or otherwise suitably attached, a sheet metal receiver 52 having upturned and inwardly 5 flanged edges 54 adapted slidably to receive the limit insertion of the reservoir and pumping unit.

Referring particularly to Figs. 2, 3, and 4, it will be seen that the cradle B has a base or pedestal I52 and outwardly flaring sides 64 and B6 defining a nozzle receiving opening 68. The lower portion of the opening 68 is V-shaped and the nozzle is firmly held against the outwardly flaring portions of the sides 64 and 66 by a screw I threaded into the top portion I2 of the cradle B and rotated to clamping or non-clamping position by a suitable handle I4.

The pedestal of the cradle B is provided with a horizontal bore 16 for slidably receiving a rod I8 that is clamped in adjusted position by a set screw 80. A handle 82 is pivoted to the rod I 8 at 8A and an anvil 86 may be moved up or down on the handle 82 and secured in adjusted position by a set screw 38. The end of the anvil 85 has a rounded nose 90 adapted to engage the cam operated pump 92 of a nozzle of the so-called unit type, that is, a nozzle having a cam operated pump as a unitary part of the nozzle structure.

When it is desired to test the nozzle to determine if there is any leakage in the joints between the several sections of which the nozzle is constructed, a nozzle block fixture is used to block the outlet of the nozzle. In Fig. 2 there is shown a nozzle block fixture comprising a sleeve 94 which is slidable on the rod I8 and secured in place by a set screw or thumb screw 96. The sleeve 94 has an upward extension 98 provided with an elongated slo-t I06 threaded nozzle block I02 having flattened sides I84 which prevent rotation of the block in the slot I053. -The block I02 has a nozzle receiving recess I06 and is adapted to be screwed firmly against the nozzle by a nut I08 which presses against the vertical extension 98. A washer III! is attached to the other end of the nozzle block by a screw II2 threaded into a tapped hole in the nozzle block and this washer prevents the nozzle block from becoming separated from the sleeve 94.

In testing some nozzles, it i preferable to use a different type of nozzle block fixture, and in Figs. 5, 6, and '7, I have shown an alternative form of nozzle block fixture. The nozzle block fixture of Figs. 5, 6, and '7 has a generally U-shaped frame II 4 having inturned ends IIS and II=8 adapted to engage behind a collar I provided by the nozzle I22 shown in phantom in these figures. An are shaped strap I24 overlies the nozzle I22 adjacent the inturned ends I IE5 and H 8 and prevents spreading of these ends at the same time it prevents the fixture from falling off the nozzle I22.

The fixture includes a nozzle block I26 having a recess I28 for receiving the discharging end of 'popping lever or handle 82 is then operated.

(Fig. 11) slidabl receiving a sharply to open or pop the check valve and cause a spray at the nozzle. If no spray appears, the nozzle is clogged and should be removed and cleaned. If spray appears, the shape of the spray can be carefully observed for several operations of the popping lever to determine if this spray has the proper shape or forms the proper pattern. The spray pan D can be used to collect and receive the spray as this pan has an inturned edge I32 which permits the spray pan to retain the fuel oil discharged in a series of tests.

To determine whether the nozzle has the correct opening hydraulic pressure, the handle 26 is operated slowly until the nozzle pops open. In performing this test the operator should watch the high pressure gauge 34 carefully to determine the exact pressure at which opening occurs and this opening pressure should be compared with the data supplied by the nozzle manufacturer.

The nozzle ma be checked for dribble or leaks by again operating the fuel pump 24 until pressure on the gauge is just below the opening pressure and checking the dribble or leaks at any point on the nozzle structure.

The pressure drop or closing point of the nozzle valve may be tested by operating the pump 24 slowly until the nozzle pops. The handle 36 is then rotated quickly to close the gauge valve, and the operator watches the drop in pressure on the gauge until the nozzle snaps shut. The pressure at which this occurs should be compared with the data supplied by the manufacturer.

In using a nozzle block fitting to check leakage in the nozzle, either the fitting shown in Figs. 2 and 11 or the fittings shown in Figs. 5, 6, and 7 may be used. In either case the block is adjusted to exert enough pressure on the nozzle to block the orifice in the nozzle cup. The handle 26 is operated to create enough pressure to open the fuel inlet tube valve in the nozzle and then the popping lever 82 is operated with strong, sharp strokes to create a high hydraulic pressure in the nozzle while the operator inspects the nozzle structure for leaks at joints between the several parts of which the structure is formed. I

The foregoing are typical examples of types of tests for which my novel apparatus is designed. The tests hereinabove described are not the only tests which can be performed with my apparatus,

' and numerous other tests may be devised for the various type of nozzles in use. It is also to be understood that my nozzle testingapparatus need not be mounted on a portable base like the base A shown in Figs. 1, 8, 9, and 10, but may be placed directly on a bench or other supporting structure. It is further to be understood that my invention is subject to numerous changes and includes all modifications and variations coming within the scope of the appended claims.

I claim:

1. Nozzle testing apparatus of the class. described, comprising a portable base, a combined fuel oil reservoir and pumping unit mounted on said base, a nozzle supporting cradle mounted On said base, means for removably securing-a nozzle in said cradle for test purposes, means for connecting said pump with said nozzle, means carried by said cradle for operating pumping mechanism associated with a nozzle under test, and means adjustably-carried by saidcradle for lioloicking the discharge outlets of a nozzle under 2. Nozzle testing apparatus of the class described, comprising a-fuel oil reservoir, a fuel oil pump supplied from said reservoir,- a cradle for supportin a nozzle under test, means for removably securing a nozzle in said cradle for test purposes, means for connecting said pump with a nozzle being tested, adjustable means carried by said cradle for actuating pumping mechanism in a nozzle under test, and nozzle blocking means adjustably carried by said cradle.

3. Means for supporting and testing the nozzle of a Diesel engine, comprising a, cradle having a pedestal and an opening for receiving a nozzle to be tested, means for removably clamping said nozzle in said opening, a rod adjustably secured to said pedestal, a nozzle pump actuating means attached to one end of said rod, and nozzle blocking means adjustably attached to the other end of said rod.

4. Nozzle testing apparatus of the class described, comprising a fuel oil reservoir, a fuel oil pump connected to said reservoir, a, cradle for supportin a nozzle under test, means for connecting said pump with said nozzle, nozzle pump actuating means mounted on said cradle, means for removably securing a nozzle in said cradle, and means for blocking said nozzle.

5. Nozzle testing apparatus of the class described, comprising a fuel oil reservoir, a fuel oil pump supplied from said reservoir, a cradle for supporting a nozzle under test, means for removably securing a nozzle in said cradle for test purposes, means for connecting said pump with a nozzle being tested, adjustable means carried by said cradle for actuating pumping mechanism in a nozzle under test, a handle for said last means, and nozzle blocking means adjustably carried by said cradle.

6. Apparatus for testing a nozzle of a Diesel engine, comprising a cradle having a supporting pedestal and a nozzle receiving portion, means for removably clamping a nozzle in said cradle, a rod slidably mounted in said cradle, means for clamping said rod in adjusted position, a sleeve adjustable On said rod, means for securing said sleeve to said rod, an upright arm rigid with said sleeve, said arm having a slot therein, a nozzle block non-rotatably mounted in said slot, and threaded means for pressing said nozzle block against a nozzle.

7. Nozzle testing apparatus of the class described, comprising a portable base, a nozzle supporting cradle mounted on said base, means for removably securing a nozzle in said cradle for test purposes, means carried by said cradle for operating pumping mechanism associated ried by said cradle.

9. Apparatus for testing a nozzle of a Diesel engine, comprising a cradle having a supporting pedestal and a nozzle receiving portion, means for removably clamping a nozzle in said cradle, a rod slidably mounted in said cradle, means for clamping said rod in adjusted position, a sleeve adjustable on said rod, means for securing said sleeve to said rod, an upright arm rigid with said sleeve, means for securing a nozzle block to said arm, and means for pressing said nozzle block against said nozzle.

10. Apparatus for testing a nozzle of a Diesel engine, comprising a cradle having a supporting r pedestal and a nozzle receiving portion, means for removably clamping a nozzle in said cradle, a rod slidablymounted in said cradle, means for clamping said rod in adjusted position, a sleeve adjustable on said rod, means for securing said sleeve to said rod, an upright arm rigid with said sleeve, said arm having a slot therein, a nozzle block nonrotatably mounted in said slot, means i for vertically adjusting said nozzle block in said slot, and threaded means for pressingsaid nozzle block against a nozzle.

, ABEL J. COLE.

REFERENCES orrnn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 601,313 Condit Mar. 21, 1898 1,373,824 MacKenzie Apr. 5, 1921 1,637,956 Moriarity Aug. 2, 1927 1,962,174 Christman June 12, 1934 2,183,189 Gormley Dec. 12, 1939 2,263,803 Graham Nov. 25, 1941 FOREIGN PATENTS Number Country Date 310,586 Great Britain May 2, 1929 

